#box{
    text-align: center;
    width:80%;
    margin:0 auto;
    }
    #nav{
    font: 36px/2em 楷体;
    background: lightblue;
    }
    #bread{
    border-bottom: 1px black dotted;
    padding:3px;
    text-align: left;}
    
    h1{font:36px/2em 黑体;}
    h2{width:60%;border-bottom: 1px black solid;margin: 40px auto 20px;}
    a{text-decoration: none;}
    a:hover{
    text-decoration: underline;
    color: red;}
    
    .banner{width: 850px;height: 320px;}
    .lastline{ margin-bottom: 2em; }
    .pics{
    width: 350px; height: 515px; margin: 8px;
    }
    .intro{
    font: 18px / 1.5em 宋体;
    width: 60%;
    margin: 20px auto;
    text-align: left;
    }